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Reports <code>for</code> loops iterating over a collection using the <code>withIndex()</code> function and not using the index variable.
<p>Use the "Remove indices in 'for' loop" quick-fix to clean up the code.</p>
<p><b>Examples:</b></p>
<pre><code>
  fun foo(bar: List&lt;String&gt;) {
     for ((index : Int, value: String) in bar.withIndex()) { // &lt;== 'index' is unused
         println(value)
     }
  }
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  fun foo(bar: List&lt;String&gt;) {
      for (value: String in bar) { // &lt;== '.withIndex()' and 'index' are removed
          println(value)
      }
  }
</code></pre>
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